EP0008913A1 - Variabler Pegelumsetzer - Google Patents

Variabler Pegelumsetzer Download PDF

Info

Publication number
EP0008913A1
EP0008913A1 EP79301730A EP79301730A EP0008913A1 EP 0008913 A1 EP0008913 A1 EP 0008913A1 EP 79301730 A EP79301730 A EP 79301730A EP 79301730 A EP79301730 A EP 79301730A EP 0008913 A1 EP0008913 A1 EP 0008913A1
Authority
EP
European Patent Office
Prior art keywords
variable
converter
level
converting unit
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP79301730A
Other languages
English (en)
French (fr)
Other versions
EP0008913B1 (de
Inventor
Shinjiro Suzuki
Tadashi Yoshikawa
Tsuguo Otsuki
Masao Takeda
Nobuhisa Kamoi
Kazuo Satoh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of EP0008913A1 publication Critical patent/EP0008913A1/de
Application granted granted Critical
Publication of EP0008913B1 publication Critical patent/EP0008913B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/14—Control of transmission; Equalising characterised by the equalising network used
    • H04B3/143—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers
    • H04B3/145—Control of transmission; Equalising characterised by the equalising network used using amplitude-frequency equalisers variable equalisers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G1/00—Details of arrangements for controlling amplification
    • H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
    • H03G1/0035—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using continuously variable impedance elements
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/005—Control by a pilot signal
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3005—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers
    • H03G3/301—Automatic control in amplifiers having semiconductor devices in amplifiers suitable for low-frequencies, e.g. audio amplifiers the gain being continuously variable

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Control Of Amplification And Gain Control (AREA)
EP79301730A 1978-08-29 1979-08-23 Variabler Pegelumsetzer Expired EP0008913B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10513778A JPS5531368A (en) 1978-08-29 1978-08-29 Transmission amount control circuit
JP105137/78 1978-08-29

Publications (2)

Publication Number Publication Date
EP0008913A1 true EP0008913A1 (de) 1980-03-19
EP0008913B1 EP0008913B1 (de) 1982-08-04

Family

ID=14399354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79301730A Expired EP0008913B1 (de) 1978-08-29 1979-08-23 Variabler Pegelumsetzer

Country Status (7)

Country Link
US (1) US4320348A (de)
EP (1) EP0008913B1 (de)
JP (1) JPS5531368A (de)
AR (1) AR220224A1 (de)
AU (1) AU530419B2 (de)
DE (1) DE2963494D1 (de)
NZ (1) NZ191332A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434266A2 (de) * 1989-12-21 1991-06-26 Ford Motor Company Limited Audiosystem zur Verstärkung eines Audiosignals

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0766557B2 (ja) * 1982-06-01 1995-07-19 パイオニア株式会社 記録情報読取装置のピツクアツプ出力レベル制御装置
US4978932A (en) * 1988-07-07 1990-12-18 Communications Satellite Corporation Microwave digitally controlled solid-state attenuator having parallel switched paths
JP2001136038A (ja) * 1999-11-01 2001-05-18 Nec Corp 利得可変型増幅装置
US7123086B2 (en) * 2003-05-07 2006-10-17 Powerwave Technologies, Inc. Feed forward amplifier employing positive feedback pilot generation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2420502A1 (de) * 1973-04-26 1974-11-14 Olympus Optical Co Automatische verstaerkungsregelschaltung
FR2285016A1 (fr) * 1974-09-12 1976-04-09 Sony Corp Circuit de limitation de niveau

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3360737A (en) * 1964-07-31 1967-12-26 Texas Instruments Inc Amplifying system having high speed and high accuracy gain control
JPS527304B1 (de) * 1969-08-29 1977-03-01

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2420502A1 (de) * 1973-04-26 1974-11-14 Olympus Optical Co Automatische verstaerkungsregelschaltung
FR2285016A1 (fr) * 1974-09-12 1976-04-09 Sony Corp Circuit de limitation de niveau

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0434266A2 (de) * 1989-12-21 1991-06-26 Ford Motor Company Limited Audiosystem zur Verstärkung eines Audiosignals
EP0434266A3 (en) * 1989-12-21 1991-11-13 Ford Motor Company Limited An audio system for amplifying an audio signal

Also Published As

Publication number Publication date
DE2963494D1 (en) 1982-09-30
US4320348A (en) 1982-03-16
EP0008913B1 (de) 1982-08-04
JPS5531368A (en) 1980-03-05
AU5016479A (en) 1980-03-06
AU530419B2 (en) 1983-07-14
NZ191332A (en) 1982-02-23
AR220224A1 (es) 1980-10-15

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